DEVICE FOR STARTING AND FEEDING A DISCHARGE LAMP

摘要

The invention relates to a device for starting a discharge lamp by means of a transistor starter, that starter being provided with an auxiliary transistor for stopping the starting procedure if the lamp fails to ignite. According to the invention a zener diode is included in the control circuit of the auxiliary transistor, while furthermore a capacitor is connected in parallel across the lamp, and a self-inductor is included in the connection from the lamp to the main transistor. In a circuit according to the invention, the auxiliary transistor has yet a second function, namely because, by the action of the zener diode, the instants the main transistor is made conductive by means of the auxiliary transistor are delayed, so that a large rise of the voltage between the electrodes of the lamp is produced which is useful for a reliable ignition of the lamp within a large temperature range.